Metal-turning lathe



(N-Model.)

J. E. ATWOOD.'`

METAL TURNING LATHE. A A 110.291,971. Patented'Jan. 15, 1884.

Irl-.3

t ing for the ready delivery thereof.

` The bed thus constructed is light and strong,

i dirt, and chips, which may be cleared ont y fln the accompanying drawings, Figure l JOHN E. A'NVOOD, OF STONlI'Gf'lON,r CONNECTICUT.

M ETA I TLn-nvlnel LATI-ie.

SPECIFICATION lforming part of Letter/s Patent No. 291,971, dated January 15,z 1854.

Application filed June 9, 1882. (No model.) l l To all whom, it mgy conoernl l Be it known 'that L'JoiiN E. Arwoon, of Stonington, in the county of New London and State of Connecticut, have invented certain new and useful Improvements in Metal-Turning Lathes, of which the following is a specification.

`My invention consists in a lathe-bed of dish shape, closed at the bottom throughout the greater part of its length, so as to retain oil, dirt, chips,l &e., and provided with an open-- The invention also consists in a bed of the kind above described, having the bearings of the head-spindle projecting separately therefrom and formed integral therewith.

l"".lh'e invention alsoeo'nsists inthe combinib tion, with the head-spindle and its bearings, of novel means for preventing end-play thereof and taking np wear.

Theinvention also consists in the eon1bination, with the tail stock and spindle, of novel means for adjusting or moving the latter.

The invent-ion also consists in other combinations of parts, hereinafter described and claimed.

represents a side elevation of iny improved lathe. Fig. 2 represents a longitudinal 'section thereof without the legs. Fig. represents a transverse section on the dotted line x fr, Fig; l. Fig. 3 represents a transverse section of the lathe. Fig. 4 represents `a longitudinal section of the tail-stock. Fig. 5 represents a side View ol' the tail-spindle. Fig. 6 repre-l sents-a longitudinal section of an internally and externally screw-threaded sleeve for inoving the tail-spindle, and Fig. 7 represents a vertical section oi the tool-post rest and aside view of the post. v Y

Similar lett-ers of reference designate corresponding parts in all the figures of the drawdesignates the bed, which is of dish shape and elosedat the bottoni, and which inclines from all vpoints toward a central opening, a.

and its peculiar shape enables it to retain oil,-

through the opening a and collected in a box or receptacle. y

`mounted. in bearings or posts AAprojeeting upward separately from the bed and formed integral with thebed. In the front .bearing or post, A, is a bushing', C, which may be made fast therein in any. suitable manner, and. in the back bearing or post, A2, isa similar bushing, C', which is provided inside the bearing or post with a shoulder, b.

C2 designates a screw-cap or cap'nut applied to the outer end of the bushing C', and by one or two friction-rings or lwashers c being interposed between the cap-nut and spindle', as shown in Fig. 2. Y

D designates the driving-cone, secured on the lated-@nitide .B auflthf 11h .125. Gf.. .which isadap'ted to bear against'tli inner end of the bushing C.

cap-nut Cl the shoulder b on the bushing G' is held snugly against the .bearing or post .A2, and at the same time the spindle B is pressed in the opposite direction, so as to hold the hub D of the. cone D snugly against the end of the bushing 0,' as shown in Eig. 2. The spindle B is hollow or tubular, and the hole extend` ing through it is of eoinparatiijely large diameter; and in order to enable a live-center of ordinary size to be used therein, l make the hole flaring at its inner end, and iit therein a bushing, d, which in turn receives the livecenter d.- It will be observed that the inner end of the taper socket in thespindle B,which receives the bushing d, is oi' the same diameter as the bore or hole of the spindle, and hence there is no abrupt shoulder in the spindie. The cap-nut C2 is provided with a hole inline with the hole in the spindle B, and through this hole and through the spindle a drift or rod may be inserted to drive ont the orA for similar Iwork, rods 'of comparatively spindle. Then the bushing d is removed, the interior of the spindle can be readily cleaned out, because ot' the absence of any abrupt shoulders in the spindle.,

A" designates the legs, which may be of any suitable construction, and E designates the feed-.screw or the shaft thereof, which is mounted in bearings'ei and is provided at the `B'desi,gna-tes. the lIeadspindle, which is.

end with a cone. E.

whichV the spindle B is held against movement,

i n win be Seen' thatA by tightening up'the center d; and in using the lathe to eut ofi' rods,

large diameter can be inserted through theI- g5 ICO '2 Y v A `eenen Upon the spindlejB is a small cone, D2, and

n the feed-'screw or' the shaft thereof', E, is driven constructed with an opening,, through which without intermediate gearing, thereby greatly- ,withdirtQ The bed Ais p'rovidedwith a rack,

directly from the head-spindle B by abelt, e', running over the pulleys D2 and E/ within the outer bearing or post, A2, and between it and the inner bearing or post, A. The bed A is the upwardly-movingpart ofthe belt e is car.- ried, asbest shown in Fig. By this construction I am enabled to drive the feed-screw orshaft E directlyfrom the head-spindle B simplifying the lathe'. The bed A is provided "'on the front and back and below'the top with V- shaped ways or guides f, and F designates theslidelrest, which 'is mounted on the bed, and' isprovi'ded with- V-shaped gibs f', engag-v ingwith said ways or guides. The guides or ways situated ashere shown are preferable-to guides or ways on the top' of the bed',- asin ordinary lathes, because in this lathe they-'cannot readily be bruisedand cannot become clogged f2, .and the slide-rest F with a pinion engaging with 'the rack and adapted to'be rotated by a handle, f3,.in the usual way, for moving the sli de-'rest by hand. 'The slide-rest is also provided-withan adjustable nut of any suit-able kind, which may be engaged with and disengaged from the feed-screw by ahandle, f4, in the usual way-.these features forming no part l of my invention.

Upon the slide-rest F is mountedV the teol-V post-rest G, which may be'moved toward and from the work by a hand-screw, G', having a right-'hand thread, g, working in anut, g', on

the slide-rest, and a left-hand thread, g2, work- A ing lin Ia nut -in the tool-post rest. By this right' and left threaded screw, the tool-post rest may be moved very quickly. =The toolpoist rest G is constructed with a hood or shield,

' y, which covers the screw G and nut gf, and A l)rotects them against dirt, as shown in Figs.

1 aud 3. The [cool-post rest G has upon ita convex projection, G2, which is hollow and concave internally, as .shown in Fig. 7, and sur,-

mounting said-projection isa Washervor ring,

l h, concaveupon the under side, so as to iit H designates the'tool-post, whichv passes is convexupon' its upper surface to -iit the ccn- 'cave interior Isurface ofthe projection, and may be considered ahead or Aiiange on the. post. The tool-post H isl provided with the usual'- holding-screw, h2, and when a tool, H', is indown, it will b e clearly seen thatthe washerv or ring h will be forced down upon the -projection G2, while the nut h will be forced up' ward, thereby clanipingthetool-p'ost securelyto the projection G on the tool-post rest G.

vWheuthe 'screvrnh2 is loosened, it will be understood that the tool-postH may be adjusted s as to hold the tool at any Vangle vertically Y or laterally. ltr-order to bring the"toolpost -have a longitudinal movement twice asgreat and tool low down, the hand-screw Gis placed at one side of' the tool-post, as best seen .kin Fig.- 1# l 7o I designates the tail-stock, and I the basepl'at'e on whiehthc same is adjustable trans.- versely to turlrtaper. The tail-stock may be clamped securely'in place on'the bed A by a clamp or bar, l, projecting under the inwardly-projecting flanges fi on the bed, and drawn up ,by bolts l, in the usual way. e J designates the tailspindle, which is iitted in a bearing, j, in the tail-stock I, wherein it is prevented from. turning by a spline', j', en-

-gaginga groove, j2, in the spindle, as shown in Fig. 2. The .spindle .T may be held tightly after adjustment by a clampingscrew, k, in a wellknown manner. j

The tail-stock I has au internal screwthread, Z, and K designates 'a sleeve havinga right-hand external thread, which engages with-the screw-thread Z,.a11d a left-hand internal thread, which engages, with a thread on. the spindle J', as shown in Fig. 2. -The'sleeve Kis providedlwith a hand-wheel, K,.whereby it-.may beturned, and it will be seen that by this construction the spindle `J is caused to as the movement of the sleeve K, and is oonsequently moved very quickly. The tail-spindle J is made hollow or tubular, and the@ smaller or inner end ofthe socket for the re- .to secure byvLetters Patent, is-

" 1. A lathe-bed of dish shape, artsen at the bottom throughout the greater portion of its IIO length, but having anopening toward which* 3. The combination, with a head spindle and its bearings, of a bushing for the front bearing, a bushing for the back bearing provided with a shoulder abutting against said bearing, a cone 'on the spindle abutting against the end of the front bushing, and a nut screwed upon the outer end of the back bushing, and against which the end .of said spindle bears,

substantially as and for the purpose described.

4. The combination ofthe Vhollow or tuba# lar 'spindle B,the bearings' A2, the bush- :seem/ x 3 ings C C"7 lthe latter provided with the shoulder b, the cap-nut CZ, having a hole fhi-ongh it, Iche .cone D, thefeed-coue D, amd the bushing d and center'd, substantially as described.

5. The combination, with a slide-restand a tooLpost rest provided With nuts of opposite pitch, of a hand-screw provided with right and left hand threads engaging with .said nuts, l

substantially as described.

6. The combination of a taibspindle hav- ,xigya serewthrea, er teiLstook with 'which tile-said spindle engages byeJ spiine andI groove,v and which is intermedi y soiewmhreaded, and a sleeve having eteriiai and intenal threads of oppostepteh, the former engaging with the thread in said stock, and the later thread engaging with said screwthreeded spindle, subs-antiai'iy as and for the purpose described.

l JOHN E ATWooD. Witnesses; 4

E. E. BRADLEY, WM. A'. GILBERT.

thread 15 

